Water-tube boiler.



Nm 7I4,867. Patnntod Dec. 2, |902-,

J. c. cooks. l WATER TUBE BOILER.

(Applaton led Oct. 4, 1901-) (No Modal.)

p pl /ll/ l I @Figli il] 1 Q UNTTED STATES PATENT OFFICE.

YORK `SHIPBUILDING COMPANY,

PORATION OF NEW JERSEY.

OF CAMDEN, NEW JERSEY, A COR- wATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 714,867, dated December 2, 1902. Application led October 4.1901. Serial No. 77,518. (No model.)

To all whom t may concern,.-

Be it known that I, JOHN C. COOKE, a citizen of the United States of America, residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Improvement in Water- Tube Boilers, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to Water-tube boilers of the kind provided with duplex tubes secured in and projecting from a header, the object of my invention being to provide a simple and efficient device for securing the tubes in place and one also which facilitates their ready removal.

The nature of my improvements will be best understood as described in connection with the drawings in which they are illustrated, and in which Figure l is a sectional view through one of the duplex tubes, the head to which the said tubes are secured, and the parts of the header in which the said tubes are secured. Fig. 2 is a cross-sectional view on the line 2 2 of Fig. l. Fig. 3 is a longitudinal sectional view of the tube-head. Fig. 4 is a cross-sectional view on the line et 4. of Fig. 3, and Fig. 5 is a view of the device used for extracting the tubes and tube-head from the header.

A and A are respectively the inner and outer Walls of the header, A2 indicating the intermediate partition usual where duplex tubes are employed. The inner wall A of the header is formed with an outwardly-converging conical opening or hole a, and opposite to this hole, in the outer wall A of the header, is formed a hand-hole a for the insertion of the tubes, the said hole being preferably of the same elliptical form indicated in Fig. 2 and having preferably its inner face A4 projecting slightly from the face of the wall, as shown.

A5 A5 indicate lugs formed on the outer face of the wall A, as indicated.

B is the tube-head, preferably formed of a malleable casting and having an annulus B', to which the outer water-tube is secured, the

said annulus preferably fitting in a perfora- 5o tion a2 of the intermediate partition A2, as shown. The two rings B and B4 are connected by braces or arms B3 B5, while from the outer end of the ring B4 extend arms B5 B5, supporting a transversely-extending head or brace B5, which is preferably formed in an internally-threaded perforation, as indicated at b5. The inner Water-tube is preferably secured to the ring or annulus B4 by screwing into its internally-threaded opening b4, and 6o the outer water-tube is preferably secured t0 the ring or annulus B by screwing'onto the externally-threaded portion (indicated at 11') and abutting against the shoulder, (indicated at 52,) the head or end of the external pipe thus forming practicallya continuation of the ring B and being formed to t the conical opening a in the wall of the header. The eX- ternal tube may be secured to the head in any convenient Way, though it is always necessary that the head should either directly or indirectly form a tight iit in the conical opening a.

C, as shown in the drawings, is both a lid and brace fitting on the inside of the perforation a and formed with an internally-threaded perforation C2, C indicating the fitted face, which rests upon the rim A4.

E is a bolt screwing into the threaded perforation C2 and having an extension E', which 8o rests upon the head B6, E2 indicating the head of the bolt, which obviously when screwed into the lid-brace C will thrust the head B outward, clamping it tightly in the perforation a and at the same time will thrust the 85 lid-brace C hard against its seat on the outer wall. By preference l make the bolt E with an outward extension E3, threaded at its outer end, as indicated at e5, and extending through an unthreadedV perforation d of a 9o dog D, the arms D4 of which rest against the outside of the Wall A in the spaces between the lugs 0.5.

F indicates a nut screwing upon the threaded extension E3 and against the dog D, and it 95 will be obvious that this nut has the'eifect of drawing the lid-brace C tight against its bearing.

I indicates the inner tube, having its inner end 'L' threaded and screwing into the ring B4 and its outer end provided with arms or projections I', which center it in the outer tube, which outer tube is indicated at J and is formed with a head J', screwing onto the ring B and itting in the conical perforation ct. The outer end J2 is closed by a cap K, screwing onto its threaded portion j?.

H is a bolt having its end threaded, as indicated at h, and a head H. When it is desired to withdraw the tubes, the bolt E and lid-brace C are removed and the bolt Hinserted through the perforation b of the dog D and screwed into the perforation h6 of the head B, the head H resting against the brace D. Obviously the action of the bolt H will thus be to draw the head B outward until the tight fit in the header-wall A is loosened, when both head and attached tubes can be readily removed through the hole a.

Having now described my invention, what I claim as new, and desire to secu re by Letters Patent. is-

l. In a water-tube boiler, a header having an outwardly-converging conical hole a in its inner wall and an oppositely-disposed hand hole, as a', in its outer wall in combination with a duplex tube-head said head having an annular rim B adapted to make a close iit in the hole 'a when thrust outward and to support an outer water-tube, an inner annulus B4 adapted to support an inner water-tube and a head B6 situated entirely within the header, a brace spanning the hole a' on the inside of the header, means acting against said brace and the head B6 to thrust the tubehead against the inner wall of the header and outer and inner water-tubes secured to the rims B and B4.

2. In a water-tube boiler, a header having an outwardlyconverging conical hole a, in its inner wall and an oppositely-disposed handhole, as a', in its outer wall in combination with a duplex tube-head, said head having an annular rim B adapted to make a close iit in the hole ct when thrust outward and to support an outer water-tube, an inner annulus B4 adapted to support an inner water-tube and a head B6, a lid and brace C spanning the hole a on the inside of the header, means acting against said lid and brace and the head B6 to thrust the tube-head against the inner .wall of the header and outer and inner watertubes secured to the rims B and B4.

3. In a water-tube boiler, a header having an outwardly-converging conical hole u, in its inner wall and an oppositely-disposed handhole, as a', in its outer wall, in combination with a duplex tube-head said 'head having an annular rim B adapted to enter the hole Ct, an inner annulus B4 and a head B6, an outer water-tube J `secured to the outside of the rim B and adapted to it in the conical hole a, an inner tube secured to the annulus B4, a brace spanning the hole a on the inside and means acting against said brace and the head Bi to thrust the tube-head toward the inner wall of the header and clamp the outer tube in hole ct.

1t. In a water-tube boiler, apheader having an outwardly-converging conical hole a in its inner wall, and an oppositely-disposed handhole, as a', in its outer wall in combination with a duplex tube-head said head having an annular rim B' adapted to make a close it in the hole a when thrust outward and to support an outer water-tube, an inner annulus B4 adapted to support an inner water-tube and a head B6, formed with a threaded perforation b4, a brace spanning the hole a on the inside of the header, means acting against said brace and the head BG to thrust the tubehead against the inner wall of the header and outer and inner water-tubes secured to the rims B and B4.

5. In a water-tube boiler, a header having an outwardly-converging conical hole a, in its inner wall and an oppositely-disposed handhole as ct' in its outer wall in combination with a duplex tube-head said head having an annular rim B adapted to make aclose fit in the hole a when thrust outward and to support an outer water-tube, an inner annulus B4 adapted to support an inner water-tube and a head B6, a lid and brace C arranged to span the hole a on the inside of the header and formed with a threaded perforation C2 and a bolt screwing in said perforation C2 and abutting against head BG.

6. In a water-tube boiler, a header having an outwardly-converging conical hole ct in its inner wall and an oppositely-disposed handhole as a' in it`s outer wall in combination with a duplex tube-head said head having an annular rim B adapted to make a close fit in the hole c when thrust outward and to support an outer water-tube, an inner annulus B4 adapted to support an inner water-tube and a head B6, a lid and brace C arranged to span the hole a on the inside of the header and formed with a threaded perforation C2, an outer dog D formed with an unthreaded perforation d, a bolt E screwing into the perforation C2 and abutting against the head B(i said head having an extension E3 extending through the dog D and threaded at its outer end, and a nut screwing on said extension E3.

7 In a water-tube boiler, a header having an outwardly-converging conical hole a in its inner wall and an oppositely-disposed handhole as a in its outer wall in combination with a duplex tube-head said head having an annular rim B adapted to make a close it in the hole a when thrust outward and to support an outer water-tube, an inner annulus B4 adapted to support an inner water-tube and a head B6, formed with a threaded perforation be, a lid and brace C arranged to span the hole a' on the inside of the header and formed with a threaded perforation C2, an outer dog D formed with an unthreaded perforation d, a bolt E screwing into the per foration C2 and abutting against the head B6 IOO said head having an extension E3 extending ternally-threaded annuius B', the internallythrough the dog D and threaded at its outer threaded annulus B4 and the transverselyto end, and a nut screwing on said extension E3. extending head B formed with a threaded 8. The duplex tube-head B having an experforation h6.

5 ternally-threaded annulus B', the internally- J. 0. COOKE.

threaded annnlus B4 and the transversely- Witnesses: extending head Bf'. CHAS. F. MYERS,

9. The duplex tube-head B having an ex- D. STEWART. 

